<?php
/**
 * Util 工具类
 */

namespace util;

class Tool
{
	public static function remove_xss_array($array){
		foreach($array as &$value){
			$value = self::remove_xss($value);
		}
		return $array;
	}
	public static function remove_xss($val) {
		// remove all non-printable characters. CR(0a) and LF(0b) and TAB(9) are allowed
		// this prevents some character re-spacing such as <java\0script>
		// note that you have to handle splits with \n, \r, and \t later since they *are* allowed in some inputs
		$val = preg_replace('/([\x00-\x08,\x0b-\x0c,\x0e-\x19])/', '', $val);

		// straight replacements, the user should never need these since they're normal characters
		// this prevents like <IMG SRC=@avascript:alert('XSS')>
		$search = 'abcdefghijklmnopqrstuvwxyz';
		$search .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
		$search .= '1234567890!@#$%^&*()';
		$search .= '~`";:?+/={}[]-_|\'\\';
		for ($i = 0; $i < strlen($search); $i++) {
			// ;? matches the ;, which is optional
			// 0{0,7} matches any padded zeros, which are optional and go up to 8 chars

			// @ @ search for the hex values
			$val = preg_replace('/(&#[xX]0{0,8}'.dechex(ord($search[$i])).';?)/i', $search[$i], $val); // with a ;
			// @ @ 0{0,7} matches '0' zero to seven times
			$val = preg_replace('/(&#0{0,8}'.ord($search[$i]).';?)/', $search[$i], $val); // with a ;
		}

		// now the only remaining whitespace attacks are \t, \n, and \r
		$ra1 = array('javascript', 'vbscript', 'expression', 'applet', 'meta', 'xml', 'blink', 'link', 'style', 'script', 'embed', 'object', 'iframe', 'frame', 'frameset', 'ilayer', 'layer', 'bgsound', 'title', 'base');
		$ra2 = array('onabort', 'onactivate', 'onafterprint', 'onafterupdate', 'onbeforeactivate', 'onbeforecopy', 'onbeforecut', 'onbeforedeactivate', 'onbeforeeditfocus', 'onbeforepaste', 'onbeforeprint', 'onbeforeunload', 'onbeforeupdate', 'onblur', 'onbounce', 'oncellchange', 'onchange', 'onclick', 'oncontextmenu', 'oncontrolselect', 'oncopy', 'oncut', 'ondataavailable', 'ondatasetchanged', 'ondatasetcomplete', 'ondblclick', 'ondeactivate', 'ondrag', 'ondragend', 'ondragenter', 'ondragleave', 'ondragover', 'ondragstart', 'ondrop', 'onerror', 'onerrorupdate', 'onfilterchange', 'onfinish', 'onfocus', 'onfocusin', 'onfocusout', 'onhelp', 'onkeydown', 'onkeypress', 'onkeyup', 'onlayoutcomplete', 'onload', 'onlosecapture', 'onmousedown', 'onmouseenter', 'onmouseleave', 'onmousemove', 'onmouseout', 'onmouseover', 'onmouseup', 'onmousewheel', 'onmove', 'onmoveend', 'onmovestart', 'onpaste', 'onpropertychange', 'onreadystatechange', 'onreset', 'onresize', 'onresizeend', 'onresizestart', 'onrowenter', 'onrowexit', 'onrowsdelete', 'onrowsinserted', 'onscroll', 'onselect', 'onselectionchange', 'onselectstart', 'onstart', 'onstop', 'onsubmit', 'onunload');
		$ra = array_merge($ra1, $ra2);

		$found = true; // keep replacing as long as the previous round replaced something
		while ($found == true) {
			$val_before = $val;
			for ($i = 0; $i < sizeof($ra); $i++) {
				$pattern = '/';
				for ($j = 0; $j < strlen($ra[$i]); $j++) {
					if ($j > 0) {
						$pattern .= '(';
						$pattern .= '(&#[xX]0{0,8}([9ab]);)';
						$pattern .= '|';
						$pattern .= '|(&#0{0,8}([9|10|13]);)';
						$pattern .= ')*';
					}
					$pattern .= $ra[$i][$j];
				}
				$pattern .= '/i';
				$replacement = substr($ra[$i], 0, 2).'<x>'.substr($ra[$i], 2); // add in <> to nerf the tag
				$val = preg_replace($pattern, $replacement, $val); // filter out the hex tags
				if ($val_before == $val) {
					// no replacements were made, so exit the loop
					$found = false;
				}
			}
		}
		return $val;
	}

	/**
	 * 根据盐值, 将传入的密码加密
	 */
	public static function saltPassword($passwd = '', $salt = '')
	{
		if (!$passwd || !$salt) {
			return false;
		}
		$md5Passwd = md5($passwd);
		$newStr = $md5Passwd . $salt;
		$hashPasswd = sha1($newStr);
		return $hashPasswd;
	}

	/**
	 * 获取随机数字
	 */
	public static function getRandomNum($len = 8)
	{
		$num = '';
		for ($i = 0; $i < $len; $i++) {
			$num .= self::_getRandomVal(1);
		}
		return $num;
	}

	/**
	 * 获取随机字母
	 */
	public static function getRandomLetter($len = 8)
	{
		$letter = '';
		for ($i = 0; $i < $len; $i++) {
			$letter .= self::_getRandomVal(2);
		}
		return $letter;
	}

	/**
	 * 获取随机数字字母组合
	 */
	public static function getRandomStr($len = 8)
	{
		$str = '';
		for ($i = 0; $i < $len; $i++) {
			$str .= self::_getRandomVal(3);
		}
		return $str;
	}

    /**
     * 生成充值订单号
     */
    public static function createRechargeOrder($len = 8)
    {
        $str = '';
        for ($i = 0; $i < $len; $i++) {
            $str .= self::_getRandomVal(3);
        }
        return date('YmdHis').$str;
    }

	/**
	 * 随机取出一个数字或字母
	 *
	 * @param int $type 类型 1数字 2字母 3混合
	 */
	protected static function _getRandomVal($type = 3)
	{
		$randomVal = array(
			1 => '0123456789',
			2 => 'ABCDEFGHIJKLMNOPQRSTUVWXYZ',
			3 => '23456789ABCDEFGHJKMNPQRSTUVWXYZ',
		);
		$str = $randomVal[$type];
		if ($str) {
			$len = strlen($str);
			$max = $len - 1;
			$key = mt_rand(0, $max);
			return $str[$key];
		}
	}

}
